USRE7122E - Improvement in padlocks - Google Patents

Description

J. H. McWI'LL'IAMS.

PA D-LO CK.

6 7 8 1 am. 2. Vv .a M .d e u S. s 1 e A un IIIIIIII' (fw/WM5@ j@ mi GRAFHER, WASHI tum blers enter.

UNITED STATES PATENT OFFICE.

vJAMES H. MewILnrAMs, 0E NEW YORK, N. Y.

IMPROVEMENT IN PADLOCKS.

Specication forming part of Letters Patent No. 116,977, dated July l1, 1871 reissue No. 7, l 22, dated May 23, 1876; application filed May 10, 1875.

To all whom it may concern:

Be it known that I, JAMES H. MGWIL- LIAMs, of the city and State of New York,

have invented an Improvement in Padlocks,

of which the following is aspecification:

Padlocks have before been made with circular tumblers, notched at their' edges, and acted upon by a key inserted from the bottom of the lock up through the tumblers, and the edges of the tumblers hold the staple-formed shackle by means ofnotches into which the Padlocks of this character are known in the trade as the Scandinavian or jail-locks.

In the locks of this construction there is a plate at the lower end of the case, that is put in place after the tumblers and disks have been inserted, and the said plate is retained in place by the edges ofthe cases being turned over or riveted. The ends of the shackle usually rest upon the inner surface of'. this plate, and the lockis thereby rendered insecure and liable to get out of order, because any foreign substance falling into either of the holesinto which the shackle is inserted will prevent the shackle passing downinto its place, and the plate can be driven oli` by blows upon the upper part of the shackle besides this, in cases where the lock is exposed to rain, the water is apt to run down the shackle into the lock.

My invention is lnade with a view to reinedying all these defects; and consists in ashackle formed with shoulders around or upon the shackle above the straight portions that enter the lock, so that the shackle cannot be driven into the lock, neither can water run down the shackle into the lock, as heretofore, and the ends of the shackle not touching the plate will not. be arrested by any dirt or slight obstruction that may fall into the lock. l

In the drawing, Figure lis a vertical section of the lock-case and tumblers. Fig. 2 is a side View of the key; and Fig. 3 is a section at the line .fr w. l

The lock-case a is made with' holes for the parallel portions b b of theshackle to pass into, and also with a central cavity for the tumblers c c, disks d d, and spring e, as heretofore usual. The plate f is fastened in by the edges of the case c being turned over. The upper part of the shackle is formed with the shoulders it',

that take against the upper end of the case a, for the purposes aforesaid.

In cases where the shackle has been provided with a pin or projection to limit the distance the shackle passes into the 1ock,the same is liable to be bent, broken, or Iiled off, and it does not act to keep water out of the lock, and' such projection is not easily made or finished, because it has to ft against the inclined surface of the case. In my lock the shackle is constructed with great ease and accuracy, because the parallel portions and shoulders are turned oft' with facility and precision.

I claim as my inventionrlhe padlock containing a staple formed shackle, having shoulders 11 all around the upper parts of the parallel portions b b to rest upon the Lipper part ofthe case a, and notches in the opposite sides of the parallel portions for the tuinblers c,` substantially as and for the purposes set forth. l

Signed by me this 7th day of May, A. D. 1875.

Witnesses:

GEO. T. PINGKNEY, CHAs. H. SMITH.

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